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Built 2026-10-17 (17 October 2026)

Portsea Quarantine Station Threshold Days by Year

10 fixed thresholds counted per year at Portsea Quarantine Station (ASN00086097): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Portsea Quarantine Station Thresholds

  • Portsea Quarantine Station: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1951 with 27.
  • Portsea Quarantine Station: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1934 with 9.
  • Portsea Quarantine Station: days with a maximum temperature at or above 30 C (86 F) in 8 years, most in 1968 with 15.
  • Portsea Quarantine Station: days with a maximum temperature at or above 90 F (32.2 C) in 8 years, most in 1968 with 10.
  • 10 fixed thresholds have at least one qualifying day at Portsea Quarantine Station.
8 years with a qualifying day
Days at or above 30 C (86 F) per year at Portsea Quarantine Station Days per year at Portsea Quarantine Station with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 1968. 0510151968: 151969: 61970: 31973: 91974: 111975: 61976: 61977: 1019681969197019731974197519761977
Days per year at Portsea Quarantine Station with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 1968.
Days at or above 30 C (86 F) per year at Portsea Quarantine Station
YearDaysDecade average
19681510.5
1969610.5
197037.5
197397.5
1974117.5
197567.5
197667.5
1977107.5
First to last qualifying date each year at Portsea Quarantine Station For each year, a bar from the first to the last day at Portsea Quarantine Station meeting 30 C (86 F). 1968: 9 January 1968 to 1 March 19681969: 8 January 1969 to 28 December 19691970: 9 February 1970 to 17 December 19701973: 2 January 1973 to 10 December 19731974: 3 January 1974 to 15 December 19741975: 20 January 1975 to 11 December 19751976: 3 January 1976 to 21 December 19761977: 2 January 1977 to 9 November 197719681969197019731974197519761977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Portsea Quarantine Station meeting 30 C (86 F).
First to last qualifying date each year at Portsea Quarantine Station
YearFirst dateLast date
19681968-01-091968-03-01
19691969-01-081969-12-28
19701970-02-091970-12-17
19731973-01-021973-12-10
19741974-01-031974-12-15
19751975-01-201975-12-11
19761976-01-031976-12-21
19771977-01-021977-11-09

Every Fixed Threshold

Fixed thresholds at Portsea Quarantine Station
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days815196810
35 C (95 F): Days4419681
40 C (104 F): Days1119681
90 F (32.2 C): Days81019683
100 F (37.8 C): Days2119681
0 C (32 F): Frost days (min1219762
20 C (68 F): Tropical nights (min7519743
10 mm (0.39 in): Days with 10 mm or more rain3627195120
25 mm (0.98 in): Days with 25 mm or more rain34919344
50 mm (1.97 in): Days with 50 mm or more rain8319241

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Portsea Quarantine Station threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).